/*
 * Tencent is pleased to support the open source community by making BK-CI 蓝鲸持续集成平台 available.
 *
 * Copyright (C) 2019 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-CI 蓝鲸持续集成平台 is licensed under the MIT license.
 *
 * A copy of the MIT License is included in this file.
 *
 *
 * Terms of the MIT License:
 * ---------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of
 * the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.tencent.bkrepo.auth.util

import java.security.SecureRandom

object OauthUtils {

    private const val CODE_LENGTH = 10
    private const val SECRET_KEY_LENGTH = 30
    private const val ACCESS_TOKEN_LENGTH = 64

    fun generateCode(): String {
        return generateRandomString(CODE_LENGTH)
    }

    fun generateSecretKey(): String {
        return generateRandomString(SECRET_KEY_LENGTH)
    }

    fun generateAccessToken(): String {
        return generateRandomString(ACCESS_TOKEN_LENGTH)
    }

    fun generateRefreshToken(): String {
        return generateRandomString(ACCESS_TOKEN_LENGTH)
    }

    fun generateRandomString(length: Int): String {
        val buffer = ByteArray(length / 2)
        SecureRandom().nextBytes(buffer)
        return buffer.toHexString()
    }

    private fun ByteArray.toHexString() = joinToString("") { String.format("%02x", it) }
}
